Build123d is a python-based, parametric, boundary representation (BREP) modeling framework for 2D and 3D CAD. It's built on the Open Cascade geometric kernel and allows for the creation of complex models using a simple and intuitive python syntax. Build123d can be used to create models for 3D printing, CNC machining, laser cutting, and other manufacturing processes. Models can be exported to a wide variety of popular CAD tools such as FreeCAD and SolidWorks.

Build123d could be considered as an evolution of CadQuery where the somewhat restrictive Fluent API (method chaining) is replaced with stateful context managers - e.g. with blocks - thus enabling the full python toolbox: for loops, references to objects, object sorting and filtering, etc.

The documentation for build123d can found at readthedocs.

There is a Discord server (shared with CadQuery) where you can ask for help in the build123d channel.

The recommended method for most users is to install build123d with one of the following two commands.

In Linux/MacOS, use the following command:

python3 -m pip install git+https://github.com/gumyr/build123d

In Windows, use the following command:

python -m pip install git+https://github.com/gumyr/build123d

If you receive errors about conflicting dependencies, you can retry the installation after having upgraded pip to the latest version with the following command:

python3 -m pip install --upgrade pip

Development install

git clone https://github.com/gumyr/build123d.git
cd build123d
python3 -m pip install -e .

Further installation instructions are available (e.g. Poetry, Apple Silicon) see the installation section on readthedocs.